Printing-press attachment



1,51 TLWE Nov. 25, 1924- H. R. KNlTTLE PRINTING PRESS ATTACHMENT Filed Feb. 18

Patented Nov. 25, 1924 militia HARRY It. KNITTLE, OF CATAWISSA, PENNSYLVANIA.

PRINTING-PRESS ATTACHMENT.'

Application filed February 18, 1924.

I '0 alt 10700111. it may concern.

Be it known that I, HARRY R. KNrr'rLn, a citizen of the United States, residing at Catawissa, in the county of Columbia and State of Pennsylvania, have invented certain new and useful Improvements in Printing-Press Attachments; and I do hereby declare the following to be a full, clear, and

exact description of the same, reference being had to the accompanying drawing, forming part of this specification.

This'invention relates to printing or stenciling machine attachments and has for its primary object to provide a mechanism that will maintain the printing rolls inoperative while allowing any desired number of stencils to be fed through between said inoperative printing rolls.

A further object is to construct said mechanism of a few number of partsof simple construction that will stand up well under wear or which may be readily repaired or replaced.

With these and other objects in view, the invention consists in certain novel details of construction and arrangements and combination of parts, all as will hereinafter be more fully described and the novel features thereof particularly pointed out in the appended claims.

In the drawings,

Figure 1 is a side elevation of several of the parts of a printing machine (shown diagrammatically) with the present invention applied thereto.

Fig. 2 is a top plan view of the structure shown in Fig. 1; and

Fig. 3 is a perspective view of the operating lever and associated parts; and

Fig. 4 is a detail view of the inner or operative end of the lever.

In the present arrangement of the printi ng nieclntnism proper, the printing rolls 10, l0" are sector-shaped in cross section and are mounted on the shaft 11 journaled in the machine frame, and the stencil feeding slide 12 is operatively connected to a crank 18 loosely mounted on said shaft. The inking rolls 1st are carried on suitable shafts above the printing rolls.

The crank 13 being loose on shaft 11, it is sought to. provide for independent actuation or operation of the printing rolls and stencil feed, as it is sometimes desirable that one or more stencils be allowed to pass Serial No. 693,721.

through between said rolls without printing therefrom.

In the preferred arrangement for accomplishing this result, there is a lever 15 pivotally mounted intermediate its ends on the crank 13, and said lever has a pivotally connected end section 16 whose free end is offset as at 17 and projects through an opening 18 in the crank hub so that it is capable of engaging a recess 19 in said shaft 11 when moved toward the axis of the shaft. The opposite end of said lever 15 is located in proximity to the handle portion of crank 13 and near this end of the lever there is mounted on the crank a clip 20 consisting of a strip of resilient material fastened at one end to the crank and having its opposite end bent back upon itself to form a recess 21 into and out of which said end of the lever can be manually moved. The reversely bent portion of the clip is indented a little to form a projection 22 and, due to the resiliency of the clip material, said end of the lever may be forced past said projection into recess 21 where it will be maintained until it is manually removed. \Vhen the lever end is withdrawn from said recess it cannot accidentally move up into the clip, because of said projection 22.

When the lever is moved into the clip, pivoted end section 16 will be moved toward the shaft and into the recess 19, provided said recess is in registry with the opening 18. If it should not be in registry therewith, the end section, being pivoted, can give sufliciently to prevent breakage, and as soon as the relative movement of the shaft and crank brings said recess into line with the end section 16, the latter will be forced into it by a spring 23 secured at one end to the lever andhaving its opposite free end bean ing against said pivoted end section. With the end section projecting through the cam hub into the recess 19 in. the shaft. the shaft 11 and printing rolls 10, 10 will be rotated simultaneously with the reciprocation of the slide 12 as the latter is actuated to feed the stencils between said rolls.

If it should be desired, however, to feed one or more stencils through between the printing rolls without operating said rolls, the operator moves the handle end of lever 15 out of the recess 22 in the clip, causing the pivoted end section to be withdrawn from the recess 19. The crank will then be free torevolve on the shaft to actuate the stencil feeding slide Without operating the printing rolls. If only one stencil is to be skipped, the lever can be moved to Withdraw its offset end portion 17 from recess 19 until the recess passes opening 18, after which the lever can be returned to its former position i. rotation '01 the shaft, a crank, a stencil feed ing' device connected to the crank and operable-by the crank independently of the rotation of said shaft and the'operation of the printing rolls, and means for connecting the crank and shaft to simultaneously operate the stencil feeding mechanism and printing rolls; 7 V

2. The combination of a rotary shaft having a recess therein, a crank journaled on the shaft, a lever pivoted on the crank, one end-of'said lever being movable into and out of engagement with the recess in the shaft, and means for maintaining said lever end in either of its positions.

' '3. The combination of a rotary shaft hav-' ing' a recess therein, a crank journaled on the shaft, a lever pivoted intermediate its ends on the crank, one end of the lever being movable into and out of engagement with the recess in the shaft, and means frictionally engaging with the opposite end of the lever for maintaining it in either of its adjusted positions.

1-. The combination of a rotary shaft liaving a recess therein, a crank jonrnnled on the shaft, a lever, one end of the lever being movable into and out of engagement with the recess in the shaft, and means mounted on the shaft and frictionally engaging the lever for maintaining the latter in either of its adjusted positions.

5. The combination of a shaft having a recess therein, a crank journaled on the shaft, a lever pivoted on the crank, said lever having a pivoted end section movable toward and away from the recess in the shaft, a spring urging said end section toward the recess in the shaft, and means for maintaining said lever in either of its adjusted positions.

6. The combination of a shaft having a recess therein, a crank jonrnaled on the shaft, a lever pivoted on the crank, said lever having a pivoted end section movable toward and away from the recess in the shaft, a spring urging said end section toward the recess in the shaft, and a spring clip mounted on the crank engaging the opposite end portion of the lever and having a yielding projection for maintainin said lever in either of its adjusted positions.

HARRY R. KNITTLE. 

